Sam Altman, the well-known president of the prolific Silicon Valley accelerator Y Combinator, is stepping down, the firm shared in a blog post on Friday. Altman is transitioning into a chairman role with other YC partners stepping up to take on his day-to-day responsibilities, as first reported by Axios. Sources tell TechCrunch YC has no succession plans. YC’s core program is currently led by chief executive officer Michael Seibel, who joined the firm as a part-time partner in 2013 and assumed the top role in 2016. The […]